Electronic configuration of germanium is 2, 8, 18 and 4. To make it extrinsic semiconductor small quantity of antimony is added.
The material obtained will be N-type germanium in which electrons and holes are equal in number.
The material obtained will be P-type germanium.
The material obtained will be N-type germanium which has more electrons than holes at room temperature.
The material obtained will be N-type germanium which has less electrons than holes at room temperature.
Antimony is a fifth group impurity and is therefore a donor of electrons.